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4 Cards in this Set
- Front
- Back
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Planets reflect what and orbit the sun in what? |
Planets reflect sunlight and orbit the sun in ellipses. |
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The solar system is held together by what ? |
Gravitational attraction. |
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What is circular motion? |
Circular motion is always caused by a force towards the centre of the circle. |
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A force that causes a circular motion is called what? |
Centripetal force. |
